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65 lines
1.8 KiB
ArmAsm
65 lines
1.8 KiB
ArmAsm
/* Set a block of memory to some byte value. 64 bit S/390 version.
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Copyright (C) 2001-2013 Free Software Foundation, Inc.
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Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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#include "asm-syntax.h"
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/* INPUT PARAMETERS
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%r2 = address of memory area
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%r3 = byte to fill memory with
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%r4 = number of bytes to fill. */
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.text
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#ifdef USE_MULTIARCH
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ENTRY(memset_z900)
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#else
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ENTRY(memset)
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#endif
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.machine "z900"
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ltgr %r4,%r4
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je .L_Z900_4
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stc %r3,0(%r2)
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cghi %r4,1
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lgr %r1,%r2
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je .L_Z900_4
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aghi %r4,-2
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srlg %r3,%r4,8
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ltgr %r3,%r3
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jne .L_Z900_14
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.L_Z900_3:
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larl %r3,.L_Z900_18
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ex %r4,0(%r3)
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.L_Z900_4:
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br %r14
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.L_Z900_14:
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mvc 1(256,%r1),0(%r1)
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la %r1,256(%r1)
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brctg %r3,.L_Z900_14
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j .L_Z900_3
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.L_Z900_18:
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mvc 1(1,%r1),0(%r1)
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#ifdef USE_MULTIARCH
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END(memset_z900)
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#else
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END(memset)
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libc_hidden_builtin_def (memset)
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#endif
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